HT05 Module

Pinout

Diagram showing pinout of the HT05 module.

Pin

Name

Direction

Description

Note

1

TX

Output

UART transmit

2

RX

Input

UART receive

Also ADC input A6

3

nPRG

Input

Select programming mode

Active low

4

TCK

Input

Spy-Bi-Wire Clock

Also TEST signal for BSL entry

5

TDIO

I/O

Spy-Bi-Wire Data

Also nRESET signal

6

GND

GND

7

VDD

Input

Power in

8+

NC

Not connected